CN116285364A - Organic silicon material for shielding neutrons and preparation method thereof - Google Patents
Organic silicon material for shielding neutrons and preparation method thereof Download PDFInfo
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- CN116285364A CN116285364A CN202310292004.0A CN202310292004A CN116285364A CN 116285364 A CN116285364 A CN 116285364A CN 202310292004 A CN202310292004 A CN 202310292004A CN 116285364 A CN116285364 A CN 116285364A
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- 239000002210 silicon-based material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 44
- -1 phenyl vinyl Chemical group 0.000 claims abstract description 38
- 229920002545 silicone oil Polymers 0.000 claims abstract description 38
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 27
- 239000001257 hydrogen Substances 0.000 claims abstract description 27
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 23
- 239000004917 carbon fiber Substances 0.000 claims abstract description 23
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 18
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052582 BN Inorganic materials 0.000 claims abstract description 13
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 239000003054 catalyst Substances 0.000 claims abstract description 10
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 229920001296 polysiloxane Polymers 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 229920002379 silicone rubber Polymers 0.000 abstract description 3
- 239000011358 absorbing material Substances 0.000 abstract description 2
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- 238000004513 sizing Methods 0.000 description 19
- 238000005096 rolling process Methods 0.000 description 15
- 230000005855 radiation Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 241000282414 Homo sapiens Species 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 238000001959 radiotherapy Methods 0.000 description 1
- 239000011163 secondary particle Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/005—Additives being defined by their particle size in general
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to the technical field of neutron shielding materials, in particular to an organosilicon material for shielding neutrons and a preparation method thereof. The neutron shielding organic silicon material is prepared from the following raw materials in parts by weight: 10-20 parts of phenyl vinyl silicone oil, 10-20 parts of phenyl hydrogen silicone oil, 5-10 parts of curing agent, 85-95 parts of boron carbide, 3-5 parts of carbon fiber and 1-3 parts of boron nitride. According to the invention, phenyl vinyl silicone oil and phenyl hydrogen-containing silicone oil are used, after the boron carbide neutron absorbing material is mixed, the phenyl vinyl silicone oil and the phenyl hydrogen-containing silicone oil can be cured into the silicon rubber at a high temperature, the silicon rubber has the characteristics of high temperature resistance and irradiation resistance, and the product can be cured in a short time by the characteristics of catalytic curing of a platinum catalyst through proper raw material proportion.
Description
Technical Field
The invention relates to the technical field of neutron shielding materials, in particular to an organosilicon material for shielding neutrons and a preparation method thereof.
Background
With the rapid development of nuclear power, nuclear power ships, irradiation processing, nondestructive detection, radiotherapy and other industries, high-energy radiation rays are widely applied to a plurality of fields of industry, medical treatment, scientific research and the like, and the main radiation protection objects are X rays, Y rays and neutrons. Neutrons are one of basic particles forming atomic nuclei, are uncharged, but can ionize substances at a higher speed to generate radioactive radiation, so that the neutrons are widely applied to the fields of national defense, scientific research, radiation treatment, detection and the like; neutrons are indispensable in developing nuclear power by utilizing nuclear fission, a large amount of clean energy is provided for human beings, however, a large amount of secondary particles generated by neutron ionization can interact with tissue cells to cause great harm to human health, meanwhile, the neutron irradiation can cause point defects and dislocation in the material to degrade the material performance, so that shielding and protection of nuclear neutrons and gamma rays become one of key factors for the development of new generation nuclear energy.
At present, polymer composite materials are often used for shielding neutrons, and compared with traditional metals and concrete, the polymer composite materials have the characteristics of low density, good attenuation curve, convenient use, low manufacturing cost, good processability and the like, and can meet the requirements of radiation occasions with different energy levels. The existing novel composite material for shielding high-energy radiation rays contains silicon carbide components which are used as neutron absorbers, but the composite material has poor flexibility and high-low temperature resistance effects and is easy to decompose in a high-temperature environment for a long time. Therefore, how to provide a neutron shielding material with good flexibility and good high and low temperature resistance effect and a preparation method thereof is a technical problem to be solved by the technicians in the field.
Disclosure of Invention
The invention aims to provide an organic silicon material for shielding neutrons and a preparation method thereof, which are used for solving the defects in the prior art.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides an organic silicon material for shielding neutrons, which is prepared from the following raw materials in parts by weight:
10-20 parts of phenyl vinyl silicone oil, 10-20 parts of phenyl hydrogen silicone oil, 5-10 parts of curing agent, 85-95 parts of boron carbide, 3-5 parts of carbon fiber and 1-3 parts of boron nitride.
Preferably, the phenyl vinyl silicone oil has a viscosity of 1000 to 1500mpa.s at 25 ℃;
the hydrogen content of the phenyl hydrogen-containing silicone oil is 0.3-0.5%, and the refractive index at 25 ℃ is 1.49-1.51.
Preferably, the curing agent is a platinum catalyst.
Preferably, the particle size of the boron carbide is 40-80 mu m, and the particle size of the boron nitride is 40-80 mu m.
Preferably, the carbon fiber has a thermal conductivity of 600 to 800W/mK.
The invention also provides a preparation method of the neutron shielding organic silicon material, which comprises the following steps:
mixing phenyl vinyl silicone oil, phenyl hydrogen silicone oil, a curing agent, boron carbide and carbon fiber, and curing to obtain the neutron shielding organic silicon material.
Preferably, the mixing is carried out at 40-60 ℃ for 15-30 min, and the stirring speed is 40-80 r/min.
Preferably, the curing temperature is 140-170 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the invention uses phenyl vinyl silicone oil and phenyl hydrogen silicone oil, which can be solidified into silicon rubber at high temperature after mixing boron carbide neutron absorbing material, and has the characteristics of high temperature resistance and irradiation resistance.
According to the invention, through proper raw material proportion and the characteristic of catalytic curing of the platinum catalyst, the product can be cured in a short time.
The raw materials of the invention contain carbon fibers, so that the heat conductivity coefficient of the organic silicon material for shielding neutrons can be effectively improved, and the high temperature resistance of the material is further improved.
Detailed Description
The invention provides an organic silicon material for shielding neutrons, which is prepared from the following raw materials in parts by weight:
10-20 parts of phenyl vinyl silicone oil, 10-20 parts of phenyl hydrogen silicone oil, 5-10 parts of curing agent, 85-95 parts of boron carbide, 3-5 parts of carbon fiber and 1-3 parts of boron nitride.
In the present invention, the phenyl vinyl silicone oil is used in an amount of 10 to 20 parts, preferably 12 to 18 parts, more preferably 14 to 16 parts.
In the present invention, the phenyl hydrogen silicone oil is used in an amount of 10 to 20 parts, preferably 12 to 18 parts, more preferably 14 to 16 parts.
In the present invention, the amount of the curing agent is 5 to 10 parts, preferably 6 to 9 parts, more preferably 7 to 8 parts.
In the present invention, the amount of boron carbide is 85 to 95 parts, preferably 88 to 92 parts, and more preferably 89 to 90 parts.
In the present invention, the amount of the carbon fiber is 3 to 5 parts, preferably 3.5 to 4.5 parts, and more preferably 3.8 to 4.2 parts.
In the present invention, the amount of boron nitride is 1 to 3 parts, preferably 1.5 to 2.5 parts, and more preferably 1.8 to 2.2 parts.
In the present invention, the phenyl vinyl silicone oil has a viscosity of 3000 to 5000mpa.s, preferably 3100 to 4500mpa.s, more preferably 3200 to 3800mpa.s at 25 ℃;
the hydrogen content of the phenyl hydrogen-containing silicone oil is 0.3-0.5%, preferably 0.35-0.45%, more preferably 0.38-0.42%, and the refractive index at 25 ℃ is 1.49-1.51, preferably 1.495-1.505.
In the invention, the curing agent is a platinum catalyst.
In the present invention, the particle diameter of the boron carbide is 40 to 80. Mu.m, preferably 50 to 70. Mu.m, and more preferably 55 to 65. Mu.m.
In the present invention, the particle diameter of the boron nitride is 40 to 80. Mu.m, preferably 50 to 70. Mu.m, and more preferably 55 to 65. Mu.m.
In the invention, the thermal conductivity of the carbon fiber is 600-800W/m.K, preferably 650-750W/m.K, more preferably 660-720W/m.K, and if the thermal conductivity of the carbon fiber is too low, the thermal conductivity of the neutron shielding organosilicon material is difficult to improve, the high temperature resistance is not obviously improved, and if the thermal conductivity is too high, the processability is poor; meanwhile, the organic silicon material for shielding neutrons contains carbon fibers, so that the problem of expansion of the organic silicon material for shielding neutrons can be effectively restrained because the carbon fibers occupy a certain volume, and the flexibility of the organic silicon material for shielding neutrons can be improved because of the excellent mechanical properties of the carbon fibers.
In the present invention, all raw materials are commercially available products.
The invention also provides a preparation method of the neutron shielding organic silicon material, which comprises the following steps:
mixing phenyl vinyl silicone oil, phenyl hydrogen silicone oil, a curing agent, boron carbide and carbon fiber, and curing to obtain the neutron shielding organic silicon material.
In the present invention, the mixing is performed at 40 to 60 ℃, preferably 45 to 55 ℃, more preferably 48 to 52 ℃, for 15 to 30 minutes, preferably 18 to 26 minutes, more preferably 20 to 25 minutes, and the stirring speed is 40 to 80r/min, preferably 50 to 70r/min, more preferably 55 to 65r/min.
In the present invention, the curing temperature is 140 to 170 ℃, preferably 150 to 162 ℃, and more preferably 155 to 160 ℃.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
The preparation method of the organic silicon material for shielding neutrons comprises the following steps:
10 parts of phenyl vinyl silicone oil with viscosity of 3000 Pa.s at 25 ℃, 10 parts of phenyl hydrogen silicone oil with hydrogen content of 0.3 percent and refractive index of 1.49 at 25 ℃, 5 parts of platinum catalyst, 85 parts of boron carbide with particle size of 40 mu m, 3 parts of carbon fiber with heat conductivity of 600W/m.K and 1 part of boron nitride with particle size of 40 mu m are stirred for 30min at 40 ℃ at a rotating speed of 40r/min, and the mixture is uniformly mixed and filled into a charging basket for standby. And (3) rolling the prepared sizing material with a rolling device, wherein the rolling thickness is 5mm, the length is 500mm, the width is 500mm, the sizing material is rolled with a backing film with a backing of 0.5mm, the sizing material is solidified for 30min at 140 ℃ on a reflow oven with a temperature range of 12 m and 6 ℃, and cooling and slitting are performed after the sizing material is discharged from the oven, so that the neutron-shielding organosilicon material with the backing on one side is obtained.
Example 2
The preparation method of the organic silicon material for shielding neutrons comprises the following steps:
12 parts of phenyl vinyl silicone oil with viscosity of 3100mpa.s at 25 ℃, 13 parts of phenyl hydrogen silicone oil with hydrogen content of 0.35 percent and refractive index of 1.495 at 25 ℃, 6 parts of platinum catalyst, 87 parts of boron carbide with particle size of 50 mu m, 3.4 parts of carbon fiber with thermal conductivity of 650W/m.K and 1.5 parts of boron nitride with particle size of 50 mu m are stirred at 45 ℃ for 26 minutes at a rotating speed of 50r/min, and the mixture is uniformly mixed and filled into a charging barrel for standby. And (3) rolling the prepared sizing material with a rolling device, wherein the rolling thickness is 5mm, the length is 500mm, the width is 500mm, the sizing material is rolled with a backing film with a backing of 0.5mm, the sizing material is solidified for 30min at 150 ℃ on a reflow oven with a temperature range of 12 m and 6 ℃, and cooling and slitting are performed after discharging, so that the neutron shielding organosilicon material with the backing on one side is obtained.
Example 3
The preparation method of the organic silicon material for shielding neutrons comprises the following steps:
15 parts of phenyl vinyl silicone oil with viscosity of 3500mPa.s at 25 ℃, 15 parts of phenyl hydrogen silicone oil with hydrogen content of 0.4% and refractive index of 1.50 at 25 ℃, 7 parts of platinum catalyst, 89 parts of boron carbide with particle size of 60 mu m, 4 parts of carbon fiber with heat conductivity of 700W/m.K and 2 parts of boron nitride with particle size of 60 mu m are stirred at 50 ℃ for 23min at a rotating speed of 60r/min, and the mixture is uniformly mixed and filled into a charging bucket for standby. And (3) rolling the prepared sizing material with a rolling device, wherein the rolling thickness is 5mm, the length is 500mm, the width is 500mm, the sizing material is rolled with a backing film with a backing of 0.5mm, the sizing material is solidified for 35min at 150 ℃ on a reflow oven with a temperature range of 12 m and 6 ℃, and cooling and slitting are performed after the sizing material is discharged from the oven, so that the neutron-shielding organosilicon material with the backing on one side is obtained.
Example 4
The preparation method of the organic silicon material for shielding neutrons comprises the following steps:
18 parts of phenyl vinyl silicone oil with viscosity of 4000MPa.s at 25 ℃, 17 parts of phenyl hydrogen silicone oil with hydrogen content of 0.45 percent and refractive index of 1.505 at 25 ℃, 9 parts of platinum catalyst, 92 parts of boron carbide with particle size of 70 mu m, 4.5 parts of carbon fiber with heat conductivity of 700W/m.K and 2.5 parts of boron nitride with particle size of 70 mu m are stirred at 55 ℃ for 18min at a rotating speed of 70r/min, and the mixture is uniformly mixed and filled into a charging barrel for standby. And (3) rolling the prepared sizing material with a rolling device, wherein the rolling thickness is 5mm, the length is 500mm, the width is 500mm, the sizing material is rolled with a backing film with a backing of 0.5mm, the sizing material is solidified for 35min at 160 ℃ on a reflow oven with a temperature zone of 12 m and 6, and cooling and slitting are performed after the sizing material is discharged from the oven, so that the neutron-shielding organosilicon material with the backing on one side is obtained.
Example 5
The preparation method of the organic silicon material for shielding neutrons comprises the following steps:
20 parts of phenyl vinyl silicone oil with viscosity of 5000MPa.s at 25 ℃, 20 parts of phenyl hydrogen silicone oil with hydrogen content of 0.5 percent and refractive index of 1.51 at 25 ℃, 10 parts of platinum catalyst, 95 parts of boron carbide with particle size of 80 mu m, 5 parts of carbon fiber with heat conductivity of 800W/m.K and 3 parts of boron nitride with particle size of 80 mu m are stirred at 60 ℃ for 15min at a rotating speed of 80r/min, and the mixture is uniformly mixed and filled into a charging basket for standby. And (3) rolling the prepared sizing material with a rolling device, wherein the rolling thickness is 5mm, the length is 500mm, the width is 500mm, the sizing material is rolled with a backing film with a backing of 0.5mm, the sizing material is solidified for 40min at 170 ℃ on a reflow oven with a temperature range of 12 m and 6 ℃, and cooling and slitting are performed after the sizing material is discharged, so that the neutron shielding organosilicon material with the backing on one side is obtained.
Comparative example 1
Comparative example 1 was different from example 3 in that no carbon fiber was added, and the rest was the same as example 3.
The neutron shielding organosilicon materials prepared in examples 1-5 and comparative example 1 were tested for flexibility, high and low temperature resistance, and neutron shielding properties, and specific test results are shown in table 1, wherein the high temperature resistance test was performed according to GBT 2423.2-2008 standard, and the low temperature resistance was performed according to GBT 2423.1-2008.
TABLE 1 results of neutron shielding organosilicon Material Performance test prepared in examples 1-5 and comparative example 1
As can be seen from the above examples and comparative examples, the present invention provides a neutron shielding silicone material, which has excellent flexibility due to the addition of carbon fibers, and can improve the high temperature resistance of the material, and the shielding rate of the material to neutrons reaches 99.9% as a whole.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (8)
1. The organic silicon material for shielding neutrons is characterized by being prepared from the following raw materials in parts by weight:
10-20 parts of phenyl vinyl silicone oil, 10-20 parts of phenyl hydrogen silicone oil, 5-10 parts of curing agent, 85-95 parts of boron carbide, 3-5 parts of carbon fiber and 1-3 parts of boron nitride.
2. The neutron shielding silicone material of claim 1, wherein the phenyl vinyl silicone oil has a viscosity of 1000 to 1500mpa.s at 25 ℃;
the hydrogen content of the phenyl hydrogen-containing silicone oil is 0.3-0.5%, and the refractive index at 25 ℃ is 1.49-1.51.
3. A neutron shielding silicone material according to claim 1 or claim 2, wherein the curing agent is a platinum catalyst.
4. A neutron shielding organosilicon material according to claim 3, wherein the particle size of the boron carbide is 40-80 μm and the particle size of the boron nitride is 40-80 μm.
5. The neutron shielding silicone material according to claim 1, 2 or 4, wherein the carbon fiber has a thermal conductivity of 600-800W/m-K.
6. The method for producing a neutron shielding silicone material according to any one of claims 1 to 5, comprising the steps of:
mixing phenyl vinyl silicone oil, phenyl hydrogen silicone oil, a curing agent, boron carbide and carbon fiber, and curing to obtain the neutron shielding organic silicon material.
7. The method for preparing a neutron shielding organic silicon material according to claim 6, wherein the mixing is carried out at 40-60 ℃ for 15-30 min, and the stirring speed is 40-80 r/min.
8. The method for producing a neutron shielding silicone material according to claim 6 or 7, wherein the curing temperature is 140-170 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310292004.0A CN116285364A (en) | 2023-03-22 | 2023-03-22 | Organic silicon material for shielding neutrons and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310292004.0A CN116285364A (en) | 2023-03-22 | 2023-03-22 | Organic silicon material for shielding neutrons and preparation method thereof |
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| CN116285364A true CN116285364A (en) | 2023-06-23 |
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| CN202310292004.0A Pending CN116285364A (en) | 2023-03-22 | 2023-03-22 | Organic silicon material for shielding neutrons and preparation method thereof |
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| Country | Link |
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